A study of bubble-defect formations in Ag sheathed Bi2Sr2CaCu2O8+x (Bi-2212) superconducting tapes

T. Haugan; S. Patel; D. T. Shaw

doi:10.1016/0921-4534(96)00341-3

A study of bubble-defect formations in Ag sheathed Bi₂Sr₂CaCu₂O_8+x (Bi-2212) superconducting tapes

T. Haugan
, S. Patel
, D. T. Shaw

Department of Electrical Engineering

SUNY Buffalo

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Bubble-defect formations were studied in Ag sheathed ∼ 60 μm thick single-filamentary Bi₂Sr₂CaCu₂O_8+x (Bi-2212) oxide-powder-in-tube (OPIT) conductors. Bubble defects were affected by the powder-processing method, spray-roasted (SR) or solid-state (SS) and annealing conditions, removing or not removing the rolling lubrication, exposing precursor powder to air, and ball-milling. The effect of powder carbon content on bubbling was studied for SR powder (370-4010 ppmw) and SS powder (220-590 ppmw). It was possible to eliminate bubbles using SS powder, appropriate pre-annealing conditions, and processing in air for a wide range of processing conditions and conductor lengths (up to 90 m). The method of eliminating bubble defects in SS powder tapes was also compatible with high critical current density (J_c) processing.

Original language	English
Pages (from-to)	183-190
Number of pages	8
Journal	Physica C: Superconductivity and its Applications
Volume	266
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(96)00341-3
State	Published - Aug 1 1996

Keywords

Ag sheathed BiSrCaCuO
Bubble defects
Carbon impurities
Solid-state and spray-roasted powder
Tapes

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10.1016/0921-4534(96)00341-3

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title = "A study of bubble-defect formations in Ag sheathed Bi2Sr2CaCu2O8+x (Bi-2212) superconducting tapes",

abstract = "Bubble-defect formations were studied in Ag sheathed ∼ 60 μm thick single-filamentary Bi2Sr2CaCu2O8+x (Bi-2212) oxide-powder-in-tube (OPIT) conductors. Bubble defects were affected by the powder-processing method, spray-roasted (SR) or solid-state (SS) and annealing conditions, removing or not removing the rolling lubrication, exposing precursor powder to air, and ball-milling. The effect of powder carbon content on bubbling was studied for SR powder (370-4010 ppmw) and SS powder (220-590 ppmw). It was possible to eliminate bubbles using SS powder, appropriate pre-annealing conditions, and processing in air for a wide range of processing conditions and conductor lengths (up to 90 m). The method of eliminating bubble defects in SS powder tapes was also compatible with high critical current density (Jc) processing.",

keywords = "Ag sheathed BiSrCaCuO, Bubble defects, Carbon impurities, Solid-state and spray-roasted powder, Tapes",

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AU - Haugan, T.

AU - Patel, S.

AU - Shaw, D. T.

PY - 1996/8/1

Y1 - 1996/8/1

N2 - Bubble-defect formations were studied in Ag sheathed ∼ 60 μm thick single-filamentary Bi2Sr2CaCu2O8+x (Bi-2212) oxide-powder-in-tube (OPIT) conductors. Bubble defects were affected by the powder-processing method, spray-roasted (SR) or solid-state (SS) and annealing conditions, removing or not removing the rolling lubrication, exposing precursor powder to air, and ball-milling. The effect of powder carbon content on bubbling was studied for SR powder (370-4010 ppmw) and SS powder (220-590 ppmw). It was possible to eliminate bubbles using SS powder, appropriate pre-annealing conditions, and processing in air for a wide range of processing conditions and conductor lengths (up to 90 m). The method of eliminating bubble defects in SS powder tapes was also compatible with high critical current density (Jc) processing.

AB - Bubble-defect formations were studied in Ag sheathed ∼ 60 μm thick single-filamentary Bi2Sr2CaCu2O8+x (Bi-2212) oxide-powder-in-tube (OPIT) conductors. Bubble defects were affected by the powder-processing method, spray-roasted (SR) or solid-state (SS) and annealing conditions, removing or not removing the rolling lubrication, exposing precursor powder to air, and ball-milling. The effect of powder carbon content on bubbling was studied for SR powder (370-4010 ppmw) and SS powder (220-590 ppmw). It was possible to eliminate bubbles using SS powder, appropriate pre-annealing conditions, and processing in air for a wide range of processing conditions and conductor lengths (up to 90 m). The method of eliminating bubble defects in SS powder tapes was also compatible with high critical current density (Jc) processing.

KW - Ag sheathed BiSrCaCuO

KW - Bubble defects

KW - Carbon impurities

KW - Solid-state and spray-roasted powder

KW - Tapes

UR - https://www.scopus.com/pages/publications/0042094754

U2 - 10.1016/0921-4534(96)00341-3

DO - 10.1016/0921-4534(96)00341-3

M3 - Article

AN - SCOPUS:0042094754

SN - 0921-4534

VL - 266

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EP - 190

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 3-4

ER -

A study of bubble-defect formations in Ag sheathed Bi₂Sr₂CaCu₂O_8+x (Bi-2212) superconducting tapes

Abstract

Keywords

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